DV just comes up with a theory in his imagination, and thinks that is what went down. i found his book hard to read because his theory is so out there.
I wouldn't go that far. He's essentially saying that there are only so many places SJL is known to have been heading - home, her mother's, 37SR, 123SR, or the PoW. The latter is, very oddly, the only one that was never searched, and about which some rather peculiar anomalies have arisen.
I don't buy his theory because
1/ he hasn't shown the pub was empty or closed
2/ he hasn't given any motive for why someone there would spontaneously kill her
3/ an accident makes little sense, because why would you cover it up if it was an innocent accident?
4/ hiding her body under the floor totally incriminates the 1986 temporary manager whenever she is found
5/ the floor in question was taken up and relaid a few years later, and nobody noticed any estate agents under there
6/ if for argument's sake you allow 1 to 3, the better place to hide a body would be behind the pub on the railway embankment, i.e. a place that does not link her
only to your own pub
7/ the timing of getting rid of her car requires it to have arrived opposite 123SR no earlier than about 1.30, but witnesses saw it there much earlier
8/ it doesn't satisfactorily address the BW sighting of SJL still alive at 2.45.
He's right to bring this up IMO.